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thermomate

Tankless Water Heater Electric 27kW 240 Volt, thermomate On Demand Instant Endless Hot Water Heater, Digital Temperature Display for Residential Whole House Shower, 114A GRAY

    • Based on 475 reviews
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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon
Arrives Tuesday, May 7
Order within 7 hours and 38 seconds
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Style: 27kW


Features

  • [Instant Unlimited Hot Water] - On demand tankless electric water heater, providing hot water in 3 seconds when you need it and as long as you need, eliminating wait time, never run out of hot water again and No More cold shower. Flow Rate 5.27GPM @35F Rise. Requires 120Amp breaker (3 Sets of Double-pole 40AMP Breakers)
  • [Self-modulating Power] - Self-modulating technology regulating the amount of energy required to heat water only when you need it with 99.8% efficient, saving up to 60% on water heating cost comparing to traditional tank water heater. Wall mounted compact size with no water tank, convenient for any spaces, saving floor space and fitting into tight spaces.
  • [Easy Installation & Safety Protection] - ETL certified with overheating protection, auto stop heating when detecting no water, quality workmanship for leakage protection
  • NOTE - Make sure this water heater is the correct size for your hot water need: 27kW at 240V draw max 114Amp; Required breaker: 3 x Double-POLE 40AMP; Wire gauge 3 x 8AWG; Unit size 17.12" x 13.12" x 3.12"; Water connection 3/4" NPT. 2-year limite warranty and 24/7 customer support services.

Brand: thermomate


Product Dimensions: 13.12"W x 17.12"H


Special Feature: Instant hot water, Leaking free & Maintenance free heating element


Color: Gray


Wattage: 27 KW


Brand: ‎thermomate


Product Dimensions: ‎13.12"W x 17.12"H


Special Feature: ‎Instant hot water, Leaking free & Maintenance free heating element


Color: ‎Gray


Wattage: ‎27 KW


Voltage: ‎240 Volts (AC)


Heat Output: ‎27 Kilowatts


Maximum Operating Pressure: ‎150 Pound per Square Inch


Manufacture Year: ‎2024


Manufacturer: ‎thermomate


Part Number: ‎ET270


Item Weight: ‎22.1 pounds


Item model number: ‎ET270


Size: ‎240V/27kW


Amperage Capacity: ‎114 Amps


Maximum Power: ‎27 Kilowatts


Installation Method: ‎Wall-Mounted


Temperature Range: ‎80-140 Degrees Fahrenheit


Certification: ‎ETL


Special Features: ‎Instant hot water, Leaking free & Maintenance free heating element


Included Components: ‎Mount Kit


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: January 23, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, May 7

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Amazing water heater, good things do come in small packages
Style: 18kW
***UPDATE*** Month 1 after installing the unit, my electric bill went from $350 the prior month down to $230 the following month. So this has had clear and immediate cost savings for my electrical usage. Very happy with the results! ---------------------- I wanted to replace my traditional tank water heater with an electric tankless, so I did hours of research and comparing models and options. Finally settled on this unit in the 18KW size to fit my needs. I wanted to the next higher up but my electrical panel and home service capacity made that a risk choice. However, I'm delighted at how well the 18kw model works for my whole home use-case. Thankfully due to having an EV, I already had a conveniently located sub-panel installed. All I had to do was upgrade the capacity on that sub-panel, which was as simple as buying a larger breaker and making sure the existing wiring was up to the task. Ended up taking out the old 30amp breaker the tank water heater used out of the main panel, installing a 40-amp dual pole breaker there in its place, then upgraded my sub-panel to 100amps, and finally installing the second 40-amp dual pole breaker in the sub-panel. Ran all the 8 AWG wire to the location where I wanted to mount the water heater and used an appropriate amount of conduit and secured to the wall, which for me thankfully was only about 6 feet of distance. If you have complex electrical situations happening, definitely call in a licensed electrician. At this point it was an easy install to mount the unit on the wall, secure the wiring which was intuitive, and wall labeled. I didn't find any of the wiring or instructions to be wrong or confusing so thats a plus. The moment of truth then arrived, powering on the unit and setting the desired water temperature. A few quick tests and bingo, hot water. Its not been 3 days since the install and multiple showers, laundry, running the dishwasher, etc. No issues whatsoever. In fact, this unit outperforms the tank water heater we had before. My family now reports that they have to set the faucet to a less hot position than they did previous during showers. The water flow is perfect even when both showers are running full blast. We get consistently hot water and don't have to adjust it multiple times during the course of the shower as we did with the old water heater. Overall, very happy with the performance of this unit! My application is a single story, 2 full bath home, so I wanted something that could handle two concurrent showers and the occasional hand washing or laundry running at the same time. And I'm thrilled to say that it works for me better than expected. I also love that its a newer design that separates the heating element from the water flow path, which means less maintenance and easier repairs if something goes wrong in the future. Time will tell in terms of durability, but I was impressed with the quality of the build, its well-made and appears to be a thoughtful and clean design. Other units I checked out before buying this one looked sloppy, not as well designed. I'm so glad I chose this model. Obviously do your research on your electrical capacity, sizing for your use-case, etc. All I can say is that it works for me in my whole house use-case in Central Florida. Northern cold climates may need a more powerful unit. For me, I've got no doubt this will be more efficient and save me money on my monthly electric bill compared to the old unit electrical consumption. To top it all off, I got this on Amazon Prime Day using a deal and the cost was unbeatable for what I got in this unit. Super happy, will update the review in the future should anything else happen to change my mind. ... show more
Reviewed in the United States on October 17, 2023 by Joe
    • Great point of use heater for the Ponderosa Party Palace aka the barn up at the country estate
Style: 11kW
I did not want to install a conventional water heater as it would run while not in use to keep the water hot. Waste of energy and expensive. This jewel was the answer as I put a shower, bathroom sink, and kitchen sink in the country estate barn. This was simple and easy to install and puts out enough hot water to shower with comfortably. You can adjust the temp to the desired output and it will provide the water you need.We had a "barn" service that I knew to be inadequate for my power needs and had the power company install a larger transformer to upgrade to a 'shop" service. All works great. ... show more
Reviewed in the United States on April 23, 2024 by Norman Quarles
    • Great!
Style: 27kW
This tankless water heater works great! Dont buy the ATMOR tankless water heater as the one I bought nearly caught fire and filled my house with smoke! I'm now told I'll have to wait a month to get my money refunded! A month!! This water heater works really well and heats the water up to 167 degrees!! Solid build, easy install!! ... show more
Reviewed in the United States on April 23, 2024 by Brian
    • Does not raise temperature as described
Style: 18kW
The media could not be loaded. I just paid $2300 to have a licensed plumber and electrician install and test this. Water is only luke warm now. The unit reads it will heat to 140 degrees F, but when I turn it up to 125 to get water hot enough to bathe in it simply sits at 95-98 and won't get hotter than 100 :( very upset, took a very cold and uncomfortable shower. Our previous water heater worked great, we just wanted to go electric. Even if I return this I will not get the 2k back I paid for installation. Why will it not heat? No support so far. We typically like to take very hot showers and baths here and bought this on the pretense that it would make hot enough water to fill both bath tubs at the same time but now the water does not get hot enough to even fill one tub. It's cold by the time it fills because the water only comes out 95 degrees. DO NOT BUY THIS IT DOES NOT WORK. please refund me, I'm now almost 3k in the hole and would re install my old working heater but they took it when they installed this one. ... show more
Reviewed in the United States on October 25, 2023 by Maxanne Hermes
    • Good investment.
Style: 27kW
Review Image by C. E. M. C. E. M.
Went in fairly easy. Just a little drip that went away after a couple days. Does a great job of heating the water. The hot water takes as long as the tank heater to get to your spigot but the difference is that you don't run out like with the tank heater. We can now fill the big tub and take long back to back showers. It cost me a fortune because I did not have enough space in my service for 6 #8 wires 3 double 40a breakers. But my panel was due for upgrade anyway. I put mine right into the old tank closet. I was concerned that the documents called for 12" clearance at the sides. I only had about 8" but I have noticed no great heat to the sides. I hope it lasts a long time but I am pleased now. ... show more
Reviewed in the United States on July 28, 2023 by C. E. M. C. E. M.
    • It takes a little time to start, but works very well.
Style: 27kW
Unit puts out hot water. After installation I couldn't get it to work. I tapped the knob and it started working. We live in central Florida with fairly warm city water, and this heater makes it hot! I'm running it at 118° and we have plenty of hot water. We replaced a competitor's unit, and I am glad we did. ... show more
Reviewed in the United States on April 5, 2024 by An Avid Reader
    • Plumbing was easy. Electrical work costly but necessary.
Style: 11kW
Review Image by Don Don
Review Image by Don Don
It’s only been running for a couple days but showers are normal and I fill my tub slower but thermomate works great. Now I test long term durability when I live alone. Three bed and two bath, kithchen with dishwasher on one thermomate heater.
Reviewed in the United States on April 4, 2024 by Don Don
    • VERY NICE!
Style: 11kW
This unit really works quite nice at our cottage where the input temp of the water is 44F. Heats the water very quickly to a comfortable temperature for showering etal. Gets much hotter is you like. Customer support is super great. Question are answered within in one business day. I would highly recommend. ... show more
Reviewed in the United States on April 3, 2024 by WoodWorker

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